* Upon completion of the upgrade, macOS High Sierra requires about 1.5GB more storage space than macOS Sierra 10.12.6. To find your model, memory, storage, and version of macOS, choose About This Mac from the Apple () menu.

Get High Sierra from the App Store

Before upgrading, it's a good idea to back up your Mac. Then follow these steps:

Click the Download button on the High Sierra page. A file named Install macOS High Sierra downloads to your Applications folder.

After download is complete, the installer opens automatically. Click Continue and follow the onscreen instructions.You may be asked to sign in with an administrator name and password to install a helper tool, then click Add Helper to continue.

Get High Sierra as an automatic download

If you're using OS X El Capitan v10.11.5 or later, High Sierra conveniently downloads in the background, making it even easier to upgrade your Mac. When the download has completed, you receive a notification indicating that High Sierra is ready to be installed. Click Install in the notification to get started.

If you want to install High Sierra later, just dismiss the notification. Install it at any time by opening the file named Install macOS High Sierra from your Applications folder, Launchpad, or Spotlight. Or delete the installer by dragging it to the Trash. You can always get it again from the App Store.

Learn more

During installation, your Mac might restart several times. It then performs some initial setup tasks in the background. While those tasks are underway, activities such as using Spotlight or Mail might not seem as fast as they were before.